forked from Minki/linux
ARM: mm: Define set_memory_* functions for ARM
Other architectures define various set_memory functions to allow attributes to be changed (e.g. set_memory_x, set_memory_rw, etc.) Currently, these functions are missing on ARM. Define these in an appropriate manner for ARM. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -481,4 +481,9 @@ static inline void __sync_cache_range_r(volatile void *p, size_t size)
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: : : "r0","r1","r2","r3","r4","r5","r6","r7", \
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: : : "r0","r1","r2","r3","r4","r5","r6","r7", \
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"r9","r10","lr","memory" )
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"r9","r10","lr","memory" )
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int set_memory_ro(unsigned long addr, int numpages);
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int set_memory_rw(unsigned long addr, int numpages);
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int set_memory_x(unsigned long addr, int numpages);
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int set_memory_nx(unsigned long addr, int numpages);
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#endif
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#endif
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@ -345,6 +345,44 @@ const struct mem_type *get_mem_type(unsigned int type)
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}
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}
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EXPORT_SYMBOL(get_mem_type);
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EXPORT_SYMBOL(get_mem_type);
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#define PTE_SET_FN(_name, pteop) \
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static int pte_set_##_name(pte_t *ptep, pgtable_t token, unsigned long addr, \
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void *data) \
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{ \
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pte_t pte = pteop(*ptep); \
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\
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set_pte_ext(ptep, pte, 0); \
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return 0; \
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} \
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#define SET_MEMORY_FN(_name, callback) \
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int set_memory_##_name(unsigned long addr, int numpages) \
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{ \
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unsigned long start = addr; \
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unsigned long size = PAGE_SIZE*numpages; \
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unsigned end = start + size; \
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\
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if (start < MODULES_VADDR || start >= MODULES_END) \
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return -EINVAL;\
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\
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if (end < MODULES_VADDR || end >= MODULES_END) \
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return -EINVAL; \
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\
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apply_to_page_range(&init_mm, start, size, callback, NULL); \
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flush_tlb_kernel_range(start, end); \
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return 0;\
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}
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PTE_SET_FN(ro, pte_wrprotect)
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PTE_SET_FN(rw, pte_mkwrite)
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PTE_SET_FN(x, pte_mkexec)
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PTE_SET_FN(nx, pte_mknexec)
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SET_MEMORY_FN(ro, pte_set_ro)
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SET_MEMORY_FN(rw, pte_set_rw)
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SET_MEMORY_FN(x, pte_set_x)
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SET_MEMORY_FN(nx, pte_set_nx)
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/*
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/*
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* Adjust the PMD section entries according to the CPU in use.
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* Adjust the PMD section entries according to the CPU in use.
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*/
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*/
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